粉末轧制Mg-Al-Zn合金的烧结  

Sintering of Mg-Al-Zn alloy prepared by powder rolling

作　　者：黄光胜[1,2] 张忠伟[1,2] 黄光杰[1,2] 汪凌云[1,2] 

机构地区：[1]重庆大学国家镁合金材料工程技术研究中心,重庆400044 [2]重庆大学材料科学与工程学院,重庆400045

出　　处：《中国有色金属学报》2009年第4期601-606,共6页The Chinese Journal of Nonferrous Metals

摘　　要：研究用粉末轧制方法制备的Mg-3%Al-1%Zn(质量分数)合金生带坯在氩气气氛下的烧结行为,用X射线衍射、差热分析以及金相方法等分析镁合金在烧结过程中的组织变化。结果表明:粉末轧制镁合金生带材可采用"预烧结-冷轧-再烧结"工艺进行烧结,即在氩气气氛下550℃预烧结120min,然后进行大变形量的冷轧,最后在600℃下保温60min实现烧结;通过再结晶、冷变形与烧结的耦合,获得的带材组织均匀,其相对密度达到97.5%。The sintering behavior of green strip of Mg-3%Al-1%Zn magnesium alloy prepared by powder rolling was studied in argon atmosphere. The development of microstructure of magnesium alloy was analyzed by using X-ray diffractometry, DSC and metallography. The results show that the magnesium alloy green strip can be sintered through sintering program ofpresintering, cold rolling and sintering. The green strip suffers presintering at 550℃ for 120min in argon atmosphere, then standing for large amount of cold roll deformation, and at last sintering at 600℃ for 60 min. The strips have uniform microstructure and high relative density of 97.5% by coupling of recrystallization, cold deformation and sintering.

关 键 词：Mg-Al-Zn合金 粉末轧制 烧结 显微组织 

分 类 号：TF124[冶金工程—粉末冶金]